Shaft-key-extracting device.



J. GLAUSEN.

SHAFT KEY EXTRACTING DEVICE.

APPLICATION FILED JUNE 25. 1907.

903,956; Patented Nov. 17, 1908.

V 7 I J vwemto; I Witnesses} I 93 JACOB OLAUSEN, OF WALNUT, IOWA,

SHAFT-IKE Y-EXTRACTIN G DE VICE Specification of Letters Patent.

Patented Nov. 17, 1908.

Application filed June 25, 1907. Serial No. 380,685.

To all whom it may concern:

Be it known that I, J AOOB GLAUsnN, a citizen of the United States, residing at Walnut, in the county of Pottawattamie and State of Iowa, have invented new and useful Improvements in Shaft-Key-Extracting Devices, of which the following is a specification.

This invention pertains to improvements in shaft key extracting devices, and relates more particularly to a device of this type which is used to extract or remove keys, or splines which are commonly employed to secure pulleys, fly wheels, etc. to shafts.

The invention though especially designed for the above purpose is nevertheless equally useful in removing nails, bolts, screws and similar fastenings.

The invention aims to provide a device of this type of increased efficiency and utility which can be quickly adjusted to grip different sized fastenings as above set forth, and which will enable the operator to easily manipulate the device in the act of removal itself.

Further and other objects will hereinafter appear.

Inthe accompanying drawings, Figure 1, depicts a perspective view of the invention, Fig. 2, is a rear elevation showing parts in section, and Fig. 3, is a fragmentary view showing the manner of using the device in removing shaft keys or splines.

In practice the invention embodies two tong-like gripping members 1, provided with gripping jaws 2, and outwardly curved levers 3, the members being pivoted to one another by means of a rivet 4. Jaws 2, are designed to engage the shaft key or spline, or the nail, bolt, screw, etc., as the case may be. In order to not only provide an adjustment which will permit of quick action in accommodating the jaws to the size of the particular fastening being operated upon, but further to provide a means which will cause the jaws 2, to positively and firmly engage the fastening during the act of removal or extraction, the levers 3, are constantly maintained under the influence of an expansive coil spring 5, for that especial purpose. In order to effect the latter there is secured to each lever 3, at its outer extremity, a pair of links 6, pivoted thereto on opposite sides, the opposite ends'of the links being pivoted on opposite sides of a head member 7, which latter to be shortly pointed out is constantly engaged by one end of the spring 6, and thereby pressed outwardly.

Rigidly secured to the rear face of the head 7, is an interiorly threaded sleeve 8, through which passes a threaded rod 9, the latter having apertured head 10, through which loosely passes an operating arm 11, by means of which latter rod 9, is rotated.

Rigidly secured to the rear face of one of the tong members 1, is a perforated sleeve 12, the perforation being of such size as to freely permit the rod 9, to pass therethrough. Coil spring 5, previously mentioned surrounds rod 9, and bears against sleeve 12, and sleeve 8, thereby causing the latter to move outwardly, carrying head 7, to which it is aflixed, with it, and by virtue of links 6, bringing the jaws 2, in engagement with each other, which is their normal relationship.

In order to provide means whereby the jaws may be easily and quickly opened to receive in their grasp the fastening to be removed, I provide a pair of depending angularly disposed arms 13, which are secured to links 6, intermediate the length of the latter,

which arms are shaped on their ends to normally engage in angular shoulders 14, formed by outwardly extending projections 15, at the base of head 7, in conjunction with the sides of the latter which incline towards one another as they approach the base.

Rigidly secured to the limbs 6, at points coincident with the points of securement of arms 13, are oppositely disposed outwardly projecting handle members 16, which being grasped in the hands of the operator and forced downwardly cause the links 6, to swing downwardly about their pivoted connection with the head 7, to force the latter downwardly against the action of spring 5. Arms 13, by virtue of their rigid connection with links 6, ride outwardly at their lower ends on the upper faces of projections 15, of head 7, and assist the latter in its downward movement. Head 7, in its downward movement carries link 6, therewith, and the latter by virtue of being pivoted to levers 3, move the latter outward at their upper ends and consequently separate the jaws 2.

As an illustration of the use of my invention Fig. 3, may be consulted. The jaws 2, having been opened as above described are brought to engage the key or spline A, which engages in registering key-ways (not shown) formed in shaft 13, and pulley C, the end of rod 9, being provided with a rotatable block or foot 17, having a depending projection 18, such foot is then positioned, by rotating rod 9, to cause the under face thereof to seat on the outer end of shaft B, after which rod 9, is again rotated, and by reason of the same engaging the threads of sleeve 8, the latter will be caused to move outwardly away from shaft B, thereby pulling key A, out of engagement with the shaft and pulley. Projection 18, of foot 17 engages with an edge of the shaft and thereby holds the foot against rotation during the act of extraction.

hat is claimed is i l. A shaft key extracting device, comprising a pair of pivoted tong members having ripping jaws, an apertured sleeve carried by said members, a head having a threaded sleeve, a threaded rod engaging with the threads of the head sleeve, and passing freely through the first sleeve, links pivoted to the tong members and to said head, means carried by the links and engaging the head to assist the latter when the same is being operated to bring the gripping jaws to open position, and a spring between said sleeves.

2. A shaft key extract-ing device, comprising a pair of pivoted gripping members having aws, an apertured sleeve carried by said members, a head having a threaded sleeve secured to one face thereof, outwardly extending projecting extensions at the base of said head, links pivoted to the outer ends of the gripping members and to the upper part of said head, depending inclined arms carried intermediate the length of said links, and having their lower ends engaging said exten sions at the base of the head, a rod threaded into engagement with said sleeve of the head and freely passing through said sleeve of the members, and a coil expansive spring surrounding said rod and abutting said sleeves at its ends.

8. A shaft'key extracting device, comprising a pair of pivoted tong members having gripping jaws, an apertured sleeve carried by said members, a head having a threaded sleeve, a threaded rod engaging with the threads of the head sleeve, and passing freely through said first mentioned sleeve, a rotatable block having a depending projection carried by the lower end of said rod, links pivoted to the tong members and to said head, means carried by the links and engaging the head to assist the latter when the same is being operated to bring the gripping jaws to open position, and a spring between said sleeves.

In testimony whereof I have signed my name to the specification in the presence of two subscribing witnesses.

JACOB CLAUSEN. Vitnesses ILL R. BIXBY, PETER C. CARSTENSEN. 

